CN101191765B - Marine atmosphere eroded environment monitoring sensor and its monitoring method - Google Patents
Marine atmosphere eroded environment monitoring sensor and its monitoring method Download PDFInfo
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- CN101191765B CN101191765B CN2006101344454A CN200610134445A CN101191765B CN 101191765 B CN101191765 B CN 101191765B CN 2006101344454 A CN2006101344454 A CN 2006101344454A CN 200610134445 A CN200610134445 A CN 200610134445A CN 101191765 B CN101191765 B CN 101191765B
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- nickel
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- electrolytic cell
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Abstract
The invention relates to an ocean corrosion environment monitoring device, in particular to an ocean atmosphere corrosion environment monitoring sensor and a monitoring method. The sensor comprises anelectrolytic cell cover, a steel thin-wall cylinder, a nickel stick and a shield conducing wire; the inner wall of the steel thin-wall cylinder is plated with nickel, then the electrolyte is stored i n the steel thin-wall cylinder, the nickel stick fixedly connected to the electrolytic cell cover is inserted into the steel thin-wall cylinder; the shield conducting wire on the nickel stick and the steel thin-wall cylinder is led out by the electrolytic cell cover, then the steel thin-wall cylinder and the electrolytic cell cover are sealed; the lead-out shield conducting wire is connected with a constant potentiometer through a plug-in part, the interior of the sensor is a corrosion signal monitoring electrolytic cell, the nickel layer plated on the inner wall of the steel thin-wall cylinder is a signal detection working plane, the outer wall of the nickel stick is a corrosion reaction generating plane, the output end of the constant potentiometer is connected with a data signal collector and a computer to collect the signal to realize the monitoring of corrosion speed and environment corrosion of metal materials in the atmospheric environment.
Description
Technical field
The present invention relates to the marine corrosion environment monitoring device, specifically a kind of marine atmosphere eroded environment monitoring sensor and monitoring method.
Background technology
For the monitoring of metallic material corrosion and corrosiveness of the environment, each main developed country of the world all attaches great importance to.The marine corrosion environment measurement is just actively carried out in the 1980s in oil field, the Britain North Sea, estimates its corrosive power and has drawn the corrosion collection of illustrative plates.Corrosion monitoring has obtained widespread usage on various countries' offshore platform.
The corrosion environment field monitoring equipment that development is advanced is realized, rapidly, continuously monitoring corrosive for a long time to corrosion environment, and wherein gordian technique is development of new monitoring sensor and monitoring method.Aspect the atmospheric corrosiveness monitoring, existing sensors is a thin plate eclipsed form atmospheric corrosion sensor at present, but it has limitation in the use, can only just can use when air humidity is higher.And when under the low humidity condition, using, can not obtain rational result.
In addition, aspect the drafting of corrosivity collection of illustrative plates, the corrosion collection of illustrative plates of this state or this area has all been drawn in North America, Australia and South Africa, is auto industry, Harbor Bridge, garden hedge, even the foundation of corrosion protection is provided for peasant's garden fence.Australian corrosion collection of illustrative plates is comparatively careful, can estimate the corrosion development speed in each area, comprises 14700 cities and towns and suburb.Has only the corrosion collection of illustrative plates in part oil development district in China, the corrosion data that the establishment of collection of illustrative plates mainly obtains according to lacing film.Draw in this way that corrosivity collection of illustrative plates speed is slow, cost is high.
Summary of the invention
In order to overcome above-mentioned deficiency, the object of the present invention is to provide a kind of marine atmosphere eroded environment monitoring sensor and monitoring method, can realize that metal material is corroded strong and weak variation of speed of development and corrosiveness of the environment to carry out for a long time, monitor rapidly, continuously under the marine atmosphere eroded environment condition.
The objective of the invention is to be achieved through the following technical solutions:
The present invention includes electrolytic cell cap, steel thin-wall drum, nickel rod and shielded conductor, wherein be coated with nickel dam on the inwall of steel thin-wall drum, an end of nickel rod is fixed on the electrolytic cell cap, and the other end inserts and is equipped with in the steel thin-wall drum of electrolytic solution; All be connected with shielded conductor on nickel rod and the steel thin-wall drum, draw by the electrolytic cell cap.
Wherein: reach between steel thin-wall drum and the electrolytic cell cap to being tightly connected between described nickel rod and the electrolytic cell cap; Described nickel rod does not insert wherein contiguously with the steel thin-wall drum; Described electrolytic cell cap adopts nylon rod or Teflom Insulation Material.
The present invention uses the monitoring method of marine atmosphere eroded environment monitoring sensor, in the nickel plating of steel thin-wall drum inwall, contains electrolytic solution then, and the nickel rod that is fixed on the electrolytic cell cap is inserted in the steel thin-wall drum; The nickel rod is drawn by the electrolytic cell cap with the shielded conductor on the steel thin-wall circle power, again with steel thin-wall drum and the sealing of electrolytic cell cap; The shielded conductor of drawing links to each other with potentiostat by connector, sensor internal is corrosion signal monitoring work electrolytic cell, steel thin-wall drum inwall nickel coating is the input workplace, nickel rod outer wall is the corrosion reaction generating plane, potentiostat signal output part and data are accepted and believed device and are linked to each other with computing machine sensor signal is gathered, and realize the monitoring of metal material corrosion speed and corrosiveness of the environment in atmospheric environment.
Wherein: nickel-plating liquid is 250g/L nickelous sulfate [NiSO
4.6H
2O], 45g/L nickel chloride [NiCl
2.6H
2O], 40g/L boric acid [H
3BO
3] mixed liquor; Described electrolytic solution and nickel-plating liquid are guaranteed reagent and the preparation of high-quality distilled water; The working sensor temperature of using is at-5 ℃～60 ℃.
Advantage of the present invention and good effect are:
1. the present invention can measure Corrosion of Metallic Materials speed under the atmospheric environment condition, also can estimate the variation of corrosiveness of the environment; Because the present invention produces the hydrogen that diffuses into sensor internal according to corrosion reaction to monitor corrosion reaction speed, do not rely on the continuity of metal surface liquid film, therefore when ambient humidity is low, also can implement monitoring, remedy existing stacked sensor hour does not detect signal at ambient humidity deficiency.
2. the present invention is coated with nickel dam at the inwall of steel thin-wall drum, because the catalytic action of nickel coating, the atomic hydrogen that produces in the corrosion process can be oxidized fully, and therefore the oxidation current that measures is that sensor signal output can reflect the Corrosion of Metallic Materials behavior fully.
3. sensor cost of the present invention is low, simple to operate, the precision height, and the variation of the oxidation current that lower corrosion speed also can be by measuring hydrogen reflects.
4. the present invention adopts nickel coating, compare with other coating to have the little characteristics of passivation current, thereby background current is little.
5. the realization of the present invention's monitoring can be designed to instrumentation, also can utilize existing potentiostat and data recorder and computing machine to form monitoring system, multiple implementation is according to circumstances arranged, thereby reduced the monitoring cost.
Description of drawings
Fig. 1 is the structural representation of sensor of the present invention;
Fig. 2 is a monitoring system synoptic diagram of the present invention;
Fig. 3 is that hydrogen infiltration electric current and ambient humidity concern collection of illustrative plates in the naval air environment;
Fig. 4 is a comparison diagram as a result in laboratory experiment result and the real atmosphere.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, monitoring sensor of the present invention comprises electrolytic cell cap 1, steel thin-wall drum 2, nickel rod 3 and shielded conductor 5, wherein be coated with nickel dam on the inwall of steel thin-wall drum 2, one end of nickel rod 3 is fixed on the electrolytic cell cap 1, the other end inserts and is equipped with in the steel thin-wall drum 2 of electrolytic solution 4, but does not contact with steel thin-wall drum 2.All be connected with shielded conductor 5 on nickel rod 3 and the steel thin-wall drum 2, draw by electrolytic cell cap 1.Reach between steel thin-wall drum 2 and the electrolytic cell cap 1 between nickel rod 3 and the electrolytic cell cap 1 and be tightly connected, guarantee that shielded conductor 5 does not contact with electrolytic solution 4 with tie point between steel thin-wall drum 2 and the nickel rod 3 with fluid sealant.Fluid sealant has multiple choices, and present embodiment is an epoxy resin sealant.Electrolytic cell cap 1 adopts insulating material such as nylon rod or teflon to make.
The monitoring method of application sensors of the present invention is:
1. with the 2 inwall nickel plating of steel thin-wall drum, nickel-plating liquid is 250g/L nickelous sulfate [NiSO
4.6H
2O], 45g/L nickel chloride [NiCl
2.6H
2O], 40g/L boric acid [H
3BO
3] mixed liquor, all need use anhydrous alcohol, acetone employing ultrasonic cleaning clean before the nickel plating and after the nickel plating, cold wind dries up.Nickel-plating liquid also can adopt other prescription, and present embodiment is above prescription, experimental results show that serviceability is good.
2. shielded conductor 5 is gone up in the welding of nickel rod 3 one ends, be connected with electrolytic cell cap 1 and be fixed together with fluid sealant, shielded conductor 5 is passed by electrolytic cell cap 1.
3. after the glue drying to be sealed, add electrolytic solution 4 in steel thin-wall drum 2, the electrolytic solution of present embodiment is that concentration is 0.1～1mol/L with the sodium hydroxide solution of the distilled water preparation of secondary or repeatedly distillation.The nickel rod 3 that is connected with the electrolytic cell cap is put into steel thin-wall drum 2, shielded conductor 5 on the steel thin-wall drum 2 is passed by electrolytic cell cap 1, and the circular groove that processes on steel thin-wall drum 2 and the electrolytic cell cap 1 cooperates and makes it to become a practical sensor with the fluid sealant sealing.The sodium hydroxide solution that adds should guarantee to insert not overflow behind the nickel rod and not be full of air in drum and the drum.The steel thin-wall drum 2 of present embodiment is made by the 16Mn steel.
4. sensor internal is corrosion signal monitoring work electrolytic cell, steel thin-wall drum 2 inwall nickel coatings are the input workplace, nickel rod 3 outer walls are the corrosion reaction generating plane, as shown in Figure 2, guarded electrode 5 (also be can be made into monitor by connector 6 and potentiostat, this example is a potentiostat) be connected, the potentiostat signal output part is accepted and believed device with data and is linked to each other with computing machine, sensor signal is gathered, realize the monitoring of metal material corrosion speed and corrosiveness of the environment in atmospheric environment.
As shown in Figure 3, be the segment of present embodiment in the monitoring of beach, Qingdao.For the correctness of verifying monitoring result maybe needs monitoring result is demarcated, can do a small amount of lacing film experiment and compare with monitoring result of the present invention.Curve representation hydrogen infiltration electric current among the figure, square frame point expression ambient humidity.
As shown in Figure 4, be the comparison of laboratory result and actual marine atmosphere measurement result, two kinds of results coincide finely.Hydrogen infiltration capacity and corrosion weight loss have good linear relationship.Wherein the hydrogen infiltration capacity is the integrated value of sensor output signal.A represents laboratory result among the figure, and B represents result in the real atmosphere.
Claims (3)
1. the monitoring method of a marine atmosphere eroded environment, it is characterized in that: adopt sensor to monitor, described sensor comprises electrolytic cell cap (1), steel thin-wall drum (2), nickel rod (3) and shielded conductor (5), wherein be coated with nickel dam on the inwall of steel thin-wall drum (2), and Sheng is gone into electrolytic solution (4), one end of nickel rod (3) is fixed on the electrolytic cell cap (1), and the other end inserts and is equipped with in the steel thin-wall drum (2) of electrolytic solution (4); All be connected with shielded conductor (5) on nickel rod (3) and the steel thin-wall drum (2), draw, again with steel thin-wall drum (2) and electrolytic cell cap (1) sealing by electrolytic cell cap (1); The shielded conductor of drawing (5) links to each other with potentiostat by connector (6), sensor internal is corrosion signal monitoring work electrolytic cell, steel thin-wall drum (2) inwall nickel coating is the input workplace, nickel rod (3) outer wall is the corrosion reaction generating plane, potentiostat signal output part and data are accepted and believed device and are linked to each other with computing machine sensor signal is gathered, and realize the monitoring of metal material corrosion speed and corrosiveness of the environment in atmospheric environment; Wherein the nickel-plating liquid of steel thin-wall drum (2) inwall is the mixed liquor of 250g/L nickelous sulfate, 45g/L nickel chloride, 40g/L boric acid.
2. by the described monitoring method of claim 1, it is characterized in that: described electrolytic solution (4) and nickel-plating liquid are guaranteed reagent and the preparation of high-quality distilled water.
3. by the described monitoring method of claim 1, it is characterized in that: the working sensor temperature of application is at-5 ℃～60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101344454A CN101191765B (en) | 2006-12-01 | 2006-12-01 | Marine atmosphere eroded environment monitoring sensor and its monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101344454A CN101191765B (en) | 2006-12-01 | 2006-12-01 | Marine atmosphere eroded environment monitoring sensor and its monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101191765A CN101191765A (en) | 2008-06-04 |
| CN101191765B true CN101191765B (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101344454A Expired - Fee Related CN101191765B (en) | 2006-12-01 | 2006-12-01 | Marine atmosphere eroded environment monitoring sensor and its monitoring method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644653B (en) * | 2009-09-05 | 2011-06-08 | 中国船舶重工集团公司第七二五研究所 | Corrosion test device with in-situ electrochemical test function |
| CN104697924A (en) * | 2015-03-12 | 2015-06-10 | 南通中国科学院海洋研究所海洋科学与技术研究发展中心 | Device and method for determining hydrogen permeation current under ocean environment condition |
| CN106610368A (en) * | 2015-10-26 | 2017-05-03 | 云南电网有限责任公司昭通供电局 | Testing device used for rapid detection of atmosphere environment metal corrosion behavior |
| CN107796739B (en) * | 2017-10-17 | 2020-06-12 | 中石化炼化工程（集团）股份有限公司 | Device and method for testing metal hydrogen permeability in moisture environment |
| CN109612919B (en) * | 2018-12-07 | 2021-06-18 | 国网山东省电力公司电力科学研究院 | Method for detecting galvanic couple type atmospheric corrosion sensor |
| CN113063699A (en) * | 2020-01-02 | 2021-07-02 | 中国科学院海洋研究所 | Device and method for testing apparent hydrogen diffusion coefficient of pure titanium |
| CN114252491A (en) * | 2021-12-07 | 2022-03-29 | 中国科学院海洋研究所 | Marine steel corrosion hydrogen permeation monitoring sensor and monitoring method in ocean tidal range area |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858204A (en) * | 1995-03-14 | 1999-01-12 | Petroleo Brasileiro S.A.:Petrobras | Electrochemical sensor and process for assessing hydrogen permeation |
| CN2466634Y (en) * | 2001-02-26 | 2001-12-19 | 中国科学院海洋研究所 | Atmospheric corrosion wet time sensor |
| CN2704837Y (en) * | 2004-06-23 | 2005-06-15 | 中国科学院海洋研究所 | Checker for researching atmospheric corrosion |
-
2006
- 2006-12-01 CN CN2006101344454A patent/CN101191765B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858204A (en) * | 1995-03-14 | 1999-01-12 | Petroleo Brasileiro S.A.:Petrobras | Electrochemical sensor and process for assessing hydrogen permeation |
| CN2466634Y (en) * | 2001-02-26 | 2001-12-19 | 中国科学院海洋研究所 | Atmospheric corrosion wet time sensor |
| CN2704837Y (en) * | 2004-06-23 | 2005-06-15 | 中国科学院海洋研究所 | Checker for researching atmospheric corrosion |
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| Publication number | Publication date |
|---|---|
| CN101191765A (en) | 2008-06-04 |
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